Double wheel caster



FIG. 1 is a plan view of a double wheel caster showing my new design;

FIG. 2 is a front view;

FIG. 3 is a bottom view;

FIG. 4 is a right side view;

FIG. 5 is a perspective view; and,

FIG. 6 is a section taken on a line A--A of FIG. 4. 

The ornamental design for a double wheel caster, as shown and described. 